stf28-461 Interpoint Corp., stf28-461 Datasheet - Page 2

• Manufacturer Part Number: stf28-461
• Description: Stf28-461 Emi Input Filters
• Manufacturer: Interpoint Corp.

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Operating COnditiOns and CharaCteristiCs
Input Voltage Range
lead Soldering Temperature (10 sec per lead)
Storage Temperature Range (Case)
Case Operating Temperature (Tc)
Derating Input/Output Current
Capacitance
Isolation
• 0 to 50 VDC continuous
• 300°C
• -65°C to +150°C
• -55°C to +125°C full power
• Derate linearly from 100% at 125°C to 0% at 135°C
• 0.045 µF max, any pin to case
• 100 megohm minimum at 500 VDC
• Any pin to case, except case pin
case.
Common
Positive
Input
Input
20 �
20 �
The case ground connection between the filter and the converter should be as low an impe
ance as possible to minimize EMI. Direct contact of baseplate to chassis ground provides the
6800 pF
500 V
6800 pF
500 V
0.65 �
The RC output is an optional
damping circuit. It is recommended in
applications where 80 volt line
transients may occur with rise times
<50 �S.
C = 6 �F Ceramic
R = 2.2
Positive
Input
Input
Common
STF28-461 EMI Input Filters
>285 �H
, 5%, 1/4 W, Carbon comp.
STF28-461
28 VOlT INPuT – 0.8 aMP
F
Common
Positive
Ground
igure
Output
Output
Case
F
igure
1: S
Rev A - 20070509
ChematiC
Page 2 of 10
STF28-461
2 �F
2: D
C
R
amping
6 �H
meChaniCal and envirOnmental
Size (maximum)
Weight (maximum)
Screening
– t
0.980 x 0.805 x 0.270 (24.89 x 20.45 x 6.86 mm)
See case A1 for dimensions.
10.3 grams typical, 11.5 grams maximum
Space Prototype (O), Class H, or Class K
Radiation tolerant to Radiation Hardness Assurance (RHA)
levels of “-” (O) or “H”, per MIL-STD-38534. Interpoint model
numbers use an “O” in the RHA designator position to indicate
the “-” (dash) Radiation Hardness Assurance level of MIL-PRF-
38534, which is defined as “no RHA”.
See “Class H and K, MIL-PRF-38534 Screening” tables for more
information. Available configurations: OO, HH, KH
ypiCal
C
irCuit
Positive
Input
Case
Ground
Input
Common
rated output current.
DC/DC Converter
2 �F
Multiple units
allowed up to
V
alueS
Common
Positive
Output
Output
Crane Aerospace & Electronics Power Solutions
6800 pF / 500 V
x 2
x 2
6800 pF / 500 V
R L
R L
6 �H
Positive
Output
Output
Common